Light support



May 29, 1928. 1,671,280 E. H. GRIFFITH LIGHT SUPPORT Filed Jan. 6, 1927V gvvowntoo WT 5:315:55: l}! I Patented May 29, 1928.

UNITED STATES PATENT OFFICE.

EDWIN H. GRIFFITH, or BALTIMORE, MARYLAND, AssIeNoR 'o WILLIAM E. noornn& soNs COMPANY, or BALTIMORE, MARYLAND, AGQRIEORATION or MARYL ND.

LIGHT SUPPORT, v

In factories and other locations where the lighting supports are subjectto excessive vibration, incandescent electric light bulbs are ofextremely short life due to destructive eflectofthe-vibration on thedelicate filaments of the light bulbs;

The. present invention'relates to a support fora lighting fixture havingyielding or shock absorbing features whereby the Vibration is absorbedand the destructive effect on the lighting filaments practicallyeliminated. The structure consists of a spring loop which I is open atthe ends of the spring, one end of the spring being most convenientlyconnected to the outlet nipple and the other to the fixture.

The conducting cord or insulated cable is most conveniently supported onthe spring as a guide.

In the accompanying drawings I have illustrated a support embodying thefeatures of my invention in the preferred form.

In the drawing:

Figure 1 is an elevation of the fixture support showing a socket, alight bulb and shade supported thereby in operative position.

Figure 2 is an elevation looking from the right in Figure 1, the socketbeing broken away intermediately and the bulb and shade there-byremoved.

Figure 3 is a perspective of the flexible supporting or shock absorbingelement.

Figure 4 is an elevation on a reduced scale of a modified construction,the view corresponding to Figure 1, with outlying parts broken away forconvenience of illustration.

Referring to the drawings by numerals, each of which is used to indicatethe same or similar parts in the different figures, the drawing shows alighting bracket or support, the same consisting of an arcuate tubularfitting 1 supported on an outlet nipple 2, the nipple being threadedexternally at 3 and the fitting being threaded internally to engage thesame, or any suitable engaging means may be used. This fittingsupports aspring 4 in the form of a loop which is preferably a circular are havingoppositely projecting engaging means or ends 5 and 5, which, as shown,are in a plane which is substantially tangential to the curve of thespring. I

The fitting 1 is provided with means, for engaging the upper projectingportion 5 of the spring 4, the said engaging means in the loop 4, thesaid end 5 being preferably providedjwith 'an eye 11' through which thepoint .of the hook is passed.

The fitting 8 has a threaded, or any preferred engagement 9 at its lowerend with a socket or sockets 12 or any suitable lighting fixture. Thesingle socket shown supports a lighting bulb 14 and a shade 15.

Current is supplied by means of a suit able conductor, shown in the formof a flexible insulated cable 16 which is led downwardly from a sourceor outlet box through the nipple 2 to the uppper fitting 1 from whichfitting the cable is passed around the spring loop 4, being supportedand guided thereby on the outer surface of the same remote from the ends5 and 5, the loop serving as. a guide and support for the cable, asshown, though this arrangement is not essential. The cable16 is led fromthe loop to and through the lower fitting 8 to the socket or sockets 12.

The socket, shade, bulb, etc., being of sufiicient weight to slightlyflex the spring, obviously vibrations of the building, floor or ceiling18, which carries the upper fitting and the nipple 2, are under thesecircun'n stances taken up by the spring and their intensity so reducedand their peaks so equalized as to eliminate the harmful effect on thefilament 19 of the light bulb, which in the absence of such feature, isquickly destroyed when subjected to the conditions described.

In Figure 3 I have disclosed a difierent form of the invention in whichthe spring loop 4 is connected to the arcuate fittings as a limitingterm, but is used for convenience in describing any fitting suitable forthe purpose in hand. p v r I have thus described specifically and in etae re e 'e wd 1 di fere t. bod Inen'tof ftlie inyention in order thatthena- ,ture and operation of the invention and the manner of using thesame may be eleerly in are used descriptiyely;rether than in ,a limitingsense, the scope of the invention being defined in the claims, i

What I claim as new and desire tosecure by Letters Patent is:

1. A support for electric light bulbs comprising 21,11 open spring loophaving free spaced ends,fittingsconnected to the oppo site ends of theloop, an outlet nipple connected to one said fitting and means forsupporting a bulb socket on the other fitting, th ezloop comprisingguiding andsupporting means for substantially. the entire length oidthecable between the fittings.

2. An electric light bracket comprising a tubular fitting having a hookand adapted to engage enoutletnipples plate spring open loop having apro ecting end with an eye to engage the hook, a second tubular fittingalso having it hook, theother end of the plate spring having in tbe gegthe seine, bulb supporting means connected to p the second fitting anda-conducting cable understood, however, the specific terrn's here leadthrough said fittings and guided and supported on ,t-he circumference ofthe spring.

3. A support for electriclight-bu lhs cornprising an open springloopahaving the :ends

spaced and freeto move iththe fieigingl'oithe spring, the free ends oi":thespring being provided with, eyes and the support compris- 4e ing anelectric fitting for :each end ,of the i loop, each said fitting hayinga hook adapt-

